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ReactJs基础_html/css_WEB-ITnose

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Jun 21, 2016 am 08:58 AM

因项目某些页面需要重构, 使用了ReactJs, 所以做了一些小demo
源码地址,含有wiki

1.JSX使得在模板插入js变量

<!DOCTYPE html><html>    <head>        <script src="../build/react.js"></script>        <script src="../build/react-dom.js"></script>        <script src="../build/browser.min.js"></script>    </head>    <body>        <div id="example"></div>        <script type="text/babel">            //JSX 允许直接在模板插入 JavaScript 变量。如果这个变量是一个数组，则会展开这个数组的所有成员            var arr = [                 <h1 id="Hellow-Pan"> Hellow, Pan </h1>,                <h2 id="I-like-React-very-much"> I like React very much! </h2>,            ];            ReactDOM.render(                <div>{arr}</div>,                document.getElementById('example')            );        </script>    </body></html>

2.ReactDomTest

<!DOCTYPE html><html>    <head>        <script src="../build/react.js"></script>        <script src="../build/react-dom.js"></script>        <script src="../build/browser.min.js"></script>    </head>    <body>        <div id="example"></div>        <script type="text/babel">            ReactDOM.render(                <h1 id="Hello-world">Hello, world!</h1>,                document.getElementById('example')                );        </script>    </body></html>

3.使用JSX支持JS与HTML混用

<!DOCTYPE html><html>    <head>        <script src="../build/react.js"></script>        <script src="../build/react-dom.js"></script>        <script src="../build/browser.min.js"></script>    </head>    <body>        <div id="example"></div>        <script type="text/babel">            var names = ['Shine', 'Pans', 'Panshang'];            //jsx可以让html和js混用, <>是html, {}是js            ReactDOM.render(                <div>                {                    names.map(function (name){                        return <div> Hello, {name}!</div>                    })                }                </div>,                document.getElementById('example')            );        </script>    </body></html>

4.创建组件

<!DOCTYPE html><html>    <head>        <script src="../build/react.js"></script>        <script src="../build/react-dom.js"></script>        <script src="../build/browser.min.js"></script>    </head>    <body>        <div id="example"></div>        <script type="text/babel">        //HelloMessage 是一个组件类。模板插入 <HelloMessage /> 时，会自动生成 HelloMessage 的一个实例            var HelloMessage = React.createClass({                render: function(){                    return <h1 id="Hello-this-props-name">Hello, {this.props.name}</h1>;                }            });            ReactDOM.render(                <HelloMessage name = "Pan" />,                document.getElementById('example')            );        </script>    </body></html>

5.使用属性 props

<!DOCTYPE html><html>    <head>        <script src="../build/react.js"></script>        <script src="../build/react-dom.js"></script>        <script src="../build/browser.min.js"></script>    </head>    <body>        <div id="example"></div>        <script type="text/babel">        //NoteList 组件有两个 span 子节点，它们都可以通过 this.props.children 读取            var NotesList = React.createClass({              render: function() {                return (                  <ol>                  {                    React.Children.map(this.props.children, function (child) {                      return <li>{child}</li>;                    })                  }                  </ol>                );              }            });            ReactDOM.render(              <NotesList>                <span>hello</span>                <span>Pan! </span>              </NotesList>,              document.body            );        </script>    </body></html>

6.PropsType

<!DOCTYPE html><html>    <head>        <script src="../build/react.js"></script>        <script src="../build/react-dom.js"></script>        <script src="../build/browser.min.js"></script>    </head>    <body>        <div id="example"></div>        <script type="text/babel">            var MyTitle = React.createClass({                //要求title的属性的data类型是string,只能是string                propTypes: {                    title: React.PropTypes.string.isRequired,                },                render: function() {                    return <h1 id="this-props-title"> {this.props.title} </h1>;                }            });            //测试部分, 将title属性设置成 int类型, 然后会报错            //将123用引号包起来标示为字符串类型将不在报错            var data = 123;            ReactDOM.render(                <MyTitle title = {data} />,                document.body                );        </script>    </body></html>

7.使用默认属性 GetDefaultProps

<!DOCTYPE html><html>    <head>        <script src="../build/react.js"></script>        <script src="../build/react-dom.js"></script>        <script src="../build/browser.min.js"></script>    </head>    <body>        <div id="example"></div>        <script type="text/babel">        //获取默认的属性        //获取的是title的值            var MyTitle = React.createClass({              getDefaultProps : function () {                return {                  title : 'shinepans'                };              },              render: function() {                 return <h1 id="this-props-title"> {this.props.title} </h1>;               }            });            ReactDOM.render(              <MyTitle />,              document.body            );        </script>    </body></html>

8.获取真实dom

<!DOCTYPE html><html>    <head>        <script src="../build/react.js"></script>        <script src="../build/react-dom.js"></script>        <script src="../build/browser.min.js"></script>    </head>    <body>        <div id="example"></div>        <script type="text/babel">            var MyComponent = React.createClass({                handleClick: function() {                //监听点击事件, 聚焦输入框                this.refs.myTextInput.focus();                },                render: function() {                    return (                    <div>                        <input type="text" ref="myTextInput" />                        <input type="button" value="Focus the text input" onClick={this.handleClick} />                    </div>                        );                    }                });            ReactDOM.render(                <MyComponent />,                document.getElementById('example')            );        </script>    </body></html>

9.通过State改变状态

<!DOCTYPE html><html>    <head>        <meta charset="utf-8")> </meta>        <script src="../build/react.js"></script>        <script src="../build/react-dom.js"></script>        <script src="../build/browser.min.js"></script>    </head>    <body>        <div id="example"></div>        <script type="text/babel">            var LikeButton = React.createClass({              getInitialState: function() {                return {liked: false};              },              handleClick: function(event) {                this.setState({liked: !this.state.liked});              },              //转换状态, 喜欢或不喜欢              render: function() {                var text = this.state.liked ? '喜欢了' : '还没喜欢';                return (                  <p onClick={this.handleClick}>                    你{text}这个.点击文本改变你的状态.                  </p>                );              }            });            ReactDOM.render(              <LikeButton />,              document.getElementById('example')            );        </script>    </body></html>

10.使用表单监听,更好的用户交互

<!DOCTYPE html><html>    <head>        <meta charset="utf-8")> </meta>        <script src="../build/react.js"></script>        <script src="../build/react-dom.js"></script>        <script src="../build/browser.min.js"></script>    </head>    <body>        <div id="example"></div>        <script type="text/babel">        //监听textarea的变化, 变化了就更新p标签里的内容        //下面初始化了 输入框和p的初始值            var Input = React.createClass({              getInitialState: function() {                return {value: '请在文本框输入文本'};              },              handleChange: function(event) {                this.setState({value: event.target.value});              },              render: function () {                var value = this.state.value;                return (                  <div>                    <textarea rows="10" cols="30" value={value} onChange={this.handleChange} />                    <p>{value}</p>                  </div>                );              }            });            ReactDOM.render(<Input/>, document.body);        </script>    </body></html>

11.使用JSBIn 直接在浏览器运行,调试JSX 很方便

JSBib网址

令文字渐变效果, 使用了props, 计时器等, 源码参考开始时给出的源代码地址

by: 潘尚

time: 2016.1.30

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